1、动词的不定式是一个什么存在动词,不定式,动词不定式,非谓语动词动词不定式能够充当除谓语动词之外的任何句子成分。不定式充当句子成分1.作主语你出去的时候带把伞是必要的。To take an umbrella when you out is necessary for you.所以,上面的句子可以改写为:It is necessary for you to take an umbrella when you go out.形容词修饰动词不定式描述的动作,即 to take an umbrella is necessary。例如:Its very necessary for us to master
2、 a forengn language.(掌握一门外语对我们来说是很有必要的。)2.作宾语(1) 类似的动词(后面跟不定式)还有哪些?(2) it 充当形式宾语,真正的宾语(to do 不定式)后置,以避免头重脚轻。I think it necessary for you to learn from others.例如:I think it important to be an honset man .(我认为做一个诚实的人很重要)常见的动词有 think, feel, make, find, consider, count, deem, judge, believe, take 等。thin
3、k/feel/make/find/consider/believe it + adj. + (for sb.) to do sth.3.作表语(1) 观察例句,思考不定式的位置和作用。Her wish was to become a teacher.不定式的位置: 系动词之后不定式的作用:充当表语例如:My job is to take care of patients in the hospital(我的工作是照顾医院里的病人)(2) 注意:除 be 动词之外,还有其它系动词有类似的用法。如:a. 他似乎是住在这个地区。He seems to be living in the area.b.
4、 他似乎是伤风了。He seems to have/get a cold.4.作补语(1) 这类及物动词常见的有:(2) 注意:需要省略 to 的情况类似用法的动词有:例如:The pelicemen saw that man open the window(警察看见那个人打开了窗户)被动语态中,被省略掉的 to 必须还原。5.作定语(后置)不定式 to drink 修饰something,作定语,放在所修饰的词后面。例如:I have a wife and a son to look after.(我有妻子和一个儿子要照顾)6.作状语(1)做目的状语(可位于句末或句首)如:I work out to lose weight(我锻炼是为了减肥)(2)做结果状语1.too.to 太.而不能.例如:He is too sick to go to work(他的病严重到不能去上班)2.adj+enough+to do 足够.能够.例如:Our money is not enough to buy a new car(我们的钱不够买一辆新车)